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<pre><span class="sourceLineNo">001</span><a name="line.1"></a>
<span class="sourceLineNo">002</span>/*<a name="line.2"></a>
<span class="sourceLineNo">003</span> * Copyright (C) 2014 Archie L. Cobbs. All rights reserved.<a name="line.3"></a>
<span class="sourceLineNo">004</span> *<a name="line.4"></a>
<span class="sourceLineNo">005</span> * $Id: ConvertedNavigableMap.html 602 2015-01-05 18:49:18Z archie.cobbs $<a name="line.5"></a>
<span class="sourceLineNo">006</span> */<a name="line.6"></a>
<span class="sourceLineNo">007</span><a name="line.7"></a>
<span class="sourceLineNo">008</span>package org.jsimpledb.util;<a name="line.8"></a>
<span class="sourceLineNo">009</span><a name="line.9"></a>
<span class="sourceLineNo">010</span>import com.google.common.base.Converter;<a name="line.10"></a>
<span class="sourceLineNo">011</span><a name="line.11"></a>
<span class="sourceLineNo">012</span>import java.util.Comparator;<a name="line.12"></a>
<span class="sourceLineNo">013</span>import java.util.Map;<a name="line.13"></a>
<span class="sourceLineNo">014</span>import java.util.NavigableMap;<a name="line.14"></a>
<span class="sourceLineNo">015</span>import java.util.NavigableSet;<a name="line.15"></a>
<span class="sourceLineNo">016</span>import java.util.NoSuchElementException;<a name="line.16"></a>
<span class="sourceLineNo">017</span>import java.util.Set;<a name="line.17"></a>
<span class="sourceLineNo">018</span><a name="line.18"></a>
<span class="sourceLineNo">019</span>/**<a name="line.19"></a>
<span class="sourceLineNo">020</span> * Provides a transformed view of a wrapped {@link NavigableMap} using a strictly invertable {@link Converter}.<a name="line.20"></a>
<span class="sourceLineNo">021</span> *<a name="line.21"></a>
<span class="sourceLineNo">022</span> * @param &lt;K&gt; key type of this map<a name="line.22"></a>
<span class="sourceLineNo">023</span> * @param &lt;V&gt; value type of this map<a name="line.23"></a>
<span class="sourceLineNo">024</span> * @param &lt;WK&gt; key type of wrapped map<a name="line.24"></a>
<span class="sourceLineNo">025</span> * @param &lt;WV&gt; value type of wrapped map<a name="line.25"></a>
<span class="sourceLineNo">026</span> */<a name="line.26"></a>
<span class="sourceLineNo">027</span>public class ConvertedNavigableMap&lt;K, V, WK, WV&gt; extends AbstractNavigableMap&lt;K, V&gt; {<a name="line.27"></a>
<span class="sourceLineNo">028</span><a name="line.28"></a>
<span class="sourceLineNo">029</span>    private final NavigableMap&lt;WK, WV&gt; map;<a name="line.29"></a>
<span class="sourceLineNo">030</span>    private final Converter&lt;K, WK&gt; keyConverter;<a name="line.30"></a>
<span class="sourceLineNo">031</span>    private final Converter&lt;V, WV&gt; valueConverter;<a name="line.31"></a>
<span class="sourceLineNo">032</span><a name="line.32"></a>
<span class="sourceLineNo">033</span>    /**<a name="line.33"></a>
<span class="sourceLineNo">034</span>     * Constructor.<a name="line.34"></a>
<span class="sourceLineNo">035</span>     *<a name="line.35"></a>
<span class="sourceLineNo">036</span>     * @param map wrapped map<a name="line.36"></a>
<span class="sourceLineNo">037</span>     * @param keyConverter key converter<a name="line.37"></a>
<span class="sourceLineNo">038</span>     * @param valueConverter value converter<a name="line.38"></a>
<span class="sourceLineNo">039</span>     * @throws IllegalArgumentException if any parameter is null<a name="line.39"></a>
<span class="sourceLineNo">040</span>     */<a name="line.40"></a>
<span class="sourceLineNo">041</span>    public ConvertedNavigableMap(NavigableMap&lt;WK, WV&gt; map, Converter&lt;K, WK&gt; keyConverter, Converter&lt;V, WV&gt; valueConverter) {<a name="line.41"></a>
<span class="sourceLineNo">042</span>        this(map, keyConverter, valueConverter, new Bounds&lt;K&gt;());<a name="line.42"></a>
<span class="sourceLineNo">043</span>    }<a name="line.43"></a>
<span class="sourceLineNo">044</span><a name="line.44"></a>
<span class="sourceLineNo">045</span>    /**<a name="line.45"></a>
<span class="sourceLineNo">046</span>     * Internal constructor.<a name="line.46"></a>
<span class="sourceLineNo">047</span>     *<a name="line.47"></a>
<span class="sourceLineNo">048</span>     * @param map wrapped map<a name="line.48"></a>
<span class="sourceLineNo">049</span>     * @param keyConverter key converter<a name="line.49"></a>
<span class="sourceLineNo">050</span>     * @param valueConverter value converter<a name="line.50"></a>
<span class="sourceLineNo">051</span>     * @throws IllegalArgumentException if any parameter is null<a name="line.51"></a>
<span class="sourceLineNo">052</span>     */<a name="line.52"></a>
<span class="sourceLineNo">053</span>    ConvertedNavigableMap(NavigableMap&lt;WK, WV&gt; map,<a name="line.53"></a>
<span class="sourceLineNo">054</span>      Converter&lt;K, WK&gt; keyConverter, Converter&lt;V, WV&gt; valueConverter, Bounds&lt;K&gt; bounds) {<a name="line.54"></a>
<span class="sourceLineNo">055</span>        super(bounds);<a name="line.55"></a>
<span class="sourceLineNo">056</span>        if (map == null)<a name="line.56"></a>
<span class="sourceLineNo">057</span>            throw new IllegalArgumentException("null map");<a name="line.57"></a>
<span class="sourceLineNo">058</span>        if (keyConverter == null)<a name="line.58"></a>
<span class="sourceLineNo">059</span>            throw new IllegalArgumentException("null keyConverter");<a name="line.59"></a>
<span class="sourceLineNo">060</span>        if (valueConverter == null)<a name="line.60"></a>
<span class="sourceLineNo">061</span>            throw new IllegalArgumentException("null valueConverter");<a name="line.61"></a>
<span class="sourceLineNo">062</span>        this.map = map;<a name="line.62"></a>
<span class="sourceLineNo">063</span>        this.keyConverter = keyConverter;<a name="line.63"></a>
<span class="sourceLineNo">064</span>        this.valueConverter = valueConverter;<a name="line.64"></a>
<span class="sourceLineNo">065</span>    }<a name="line.65"></a>
<span class="sourceLineNo">066</span><a name="line.66"></a>
<span class="sourceLineNo">067</span>    public Converter&lt;K, WK&gt; getKeyConverter() {<a name="line.67"></a>
<span class="sourceLineNo">068</span>        return this.keyConverter;<a name="line.68"></a>
<span class="sourceLineNo">069</span>    }<a name="line.69"></a>
<span class="sourceLineNo">070</span><a name="line.70"></a>
<span class="sourceLineNo">071</span>    public Converter&lt;V, WV&gt; getValueConverter() {<a name="line.71"></a>
<span class="sourceLineNo">072</span>        return this.valueConverter;<a name="line.72"></a>
<span class="sourceLineNo">073</span>    }<a name="line.73"></a>
<span class="sourceLineNo">074</span><a name="line.74"></a>
<span class="sourceLineNo">075</span>    @Override<a name="line.75"></a>
<span class="sourceLineNo">076</span>    public Comparator&lt;? super K&gt; comparator() {<a name="line.76"></a>
<span class="sourceLineNo">077</span>        return new ConvertedComparator&lt;K, WK&gt;(this.map.comparator(), this.keyConverter);<a name="line.77"></a>
<span class="sourceLineNo">078</span>    }<a name="line.78"></a>
<span class="sourceLineNo">079</span><a name="line.79"></a>
<span class="sourceLineNo">080</span>    @Override<a name="line.80"></a>
<span class="sourceLineNo">081</span>    @SuppressWarnings("unchecked")<a name="line.81"></a>
<span class="sourceLineNo">082</span>    public V get(Object key) {<a name="line.82"></a>
<span class="sourceLineNo">083</span>        WK wkey = null;<a name="line.83"></a>
<span class="sourceLineNo">084</span>        if (key != null) {<a name="line.84"></a>
<span class="sourceLineNo">085</span>            try {<a name="line.85"></a>
<span class="sourceLineNo">086</span>                wkey = this.keyConverter.convert((K)key);<a name="line.86"></a>
<span class="sourceLineNo">087</span>            } catch (ClassCastException e) {<a name="line.87"></a>
<span class="sourceLineNo">088</span>                return null;<a name="line.88"></a>
<span class="sourceLineNo">089</span>            }<a name="line.89"></a>
<span class="sourceLineNo">090</span>        }<a name="line.90"></a>
<span class="sourceLineNo">091</span>        final WV wvalue = this.map.get(wkey);<a name="line.91"></a>
<span class="sourceLineNo">092</span>        return wvalue != null ? this.valueConverter.reverse().convert(wvalue) : null;<a name="line.92"></a>
<span class="sourceLineNo">093</span>    }<a name="line.93"></a>
<span class="sourceLineNo">094</span><a name="line.94"></a>
<span class="sourceLineNo">095</span>    @Override<a name="line.95"></a>
<span class="sourceLineNo">096</span>    public Set&lt;Map.Entry&lt;K, V&gt;&gt; entrySet() {<a name="line.96"></a>
<span class="sourceLineNo">097</span>        return new ConvertedEntrySet&lt;K, V, WK, WV&gt;(this.map, this.keyConverter, this.valueConverter);<a name="line.97"></a>
<span class="sourceLineNo">098</span>    }<a name="line.98"></a>
<span class="sourceLineNo">099</span><a name="line.99"></a>
<span class="sourceLineNo">100</span>    @Override<a name="line.100"></a>
<span class="sourceLineNo">101</span>    public NavigableSet&lt;K&gt; navigableKeySet() {<a name="line.101"></a>
<span class="sourceLineNo">102</span>        return new ConvertedNavigableSet&lt;K, WK&gt;(this.map.navigableKeySet(), this.keyConverter);<a name="line.102"></a>
<span class="sourceLineNo">103</span>    }<a name="line.103"></a>
<span class="sourceLineNo">104</span><a name="line.104"></a>
<span class="sourceLineNo">105</span>    @Override<a name="line.105"></a>
<span class="sourceLineNo">106</span>    public V put(K key, V value) {<a name="line.106"></a>
<span class="sourceLineNo">107</span>        final WK wkey = key != null ? this.keyConverter.convert(key) : null;<a name="line.107"></a>
<span class="sourceLineNo">108</span>        final WV wvalue = value != null ? this.valueConverter.convert(value) : null;<a name="line.108"></a>
<span class="sourceLineNo">109</span>        final WV wprev = this.map.put(wkey, wvalue);<a name="line.109"></a>
<span class="sourceLineNo">110</span>        return wprev != null ? this.valueConverter.reverse().convert(wprev) : null;<a name="line.110"></a>
<span class="sourceLineNo">111</span>    }<a name="line.111"></a>
<span class="sourceLineNo">112</span><a name="line.112"></a>
<span class="sourceLineNo">113</span>    @Override<a name="line.113"></a>
<span class="sourceLineNo">114</span>    @SuppressWarnings("unchecked")<a name="line.114"></a>
<span class="sourceLineNo">115</span>    public V remove(Object key) {<a name="line.115"></a>
<span class="sourceLineNo">116</span>        WK wkey = null;<a name="line.116"></a>
<span class="sourceLineNo">117</span>        if (key != null) {<a name="line.117"></a>
<span class="sourceLineNo">118</span>            try {<a name="line.118"></a>
<span class="sourceLineNo">119</span>                wkey = this.keyConverter.convert((K)key);<a name="line.119"></a>
<span class="sourceLineNo">120</span>            } catch (ClassCastException e) {<a name="line.120"></a>
<span class="sourceLineNo">121</span>                return null;<a name="line.121"></a>
<span class="sourceLineNo">122</span>            }<a name="line.122"></a>
<span class="sourceLineNo">123</span>        }<a name="line.123"></a>
<span class="sourceLineNo">124</span>        final WV wvalue = this.map.remove(wkey);<a name="line.124"></a>
<span class="sourceLineNo">125</span>        return wvalue != null ? this.valueConverter.reverse().convert(wvalue) : null;<a name="line.125"></a>
<span class="sourceLineNo">126</span>    }<a name="line.126"></a>
<span class="sourceLineNo">127</span><a name="line.127"></a>
<span class="sourceLineNo">128</span>    @Override<a name="line.128"></a>
<span class="sourceLineNo">129</span>    public void clear() {<a name="line.129"></a>
<span class="sourceLineNo">130</span>        this.map.clear();<a name="line.130"></a>
<span class="sourceLineNo">131</span>    }<a name="line.131"></a>
<span class="sourceLineNo">132</span><a name="line.132"></a>
<span class="sourceLineNo">133</span>    @Override<a name="line.133"></a>
<span class="sourceLineNo">134</span>    public boolean isEmpty() {<a name="line.134"></a>
<span class="sourceLineNo">135</span>        return this.map.isEmpty();<a name="line.135"></a>
<span class="sourceLineNo">136</span>    }<a name="line.136"></a>
<span class="sourceLineNo">137</span><a name="line.137"></a>
<span class="sourceLineNo">138</span>    @Override<a name="line.138"></a>
<span class="sourceLineNo">139</span>    public int size() {<a name="line.139"></a>
<span class="sourceLineNo">140</span>        return this.map.size();<a name="line.140"></a>
<span class="sourceLineNo">141</span>    }<a name="line.141"></a>
<span class="sourceLineNo">142</span><a name="line.142"></a>
<span class="sourceLineNo">143</span>    @Override<a name="line.143"></a>
<span class="sourceLineNo">144</span>    protected Map.Entry&lt;K, V&gt; searchBelow(K maxKey, boolean inclusive) {<a name="line.144"></a>
<span class="sourceLineNo">145</span>        try {<a name="line.145"></a>
<span class="sourceLineNo">146</span>            return super.searchBelow(maxKey, inclusive);<a name="line.146"></a>
<span class="sourceLineNo">147</span>        } catch (IllegalArgumentException e) {                      // handle case where elem is out of bounds<a name="line.147"></a>
<span class="sourceLineNo">148</span>            final Map.Entry&lt;K, V&gt; lastEntry;<a name="line.148"></a>
<span class="sourceLineNo">149</span>            try {<a name="line.149"></a>
<span class="sourceLineNo">150</span>                lastEntry = this.lastEntry();<a name="line.150"></a>
<span class="sourceLineNo">151</span>            } catch (NoSuchElementException e2) {<a name="line.151"></a>
<span class="sourceLineNo">152</span>                return null;<a name="line.152"></a>
<span class="sourceLineNo">153</span>            }<a name="line.153"></a>
<span class="sourceLineNo">154</span>            return this.getComparator(false).compare(maxKey, lastEntry.getKey()) &gt; 0 ? lastEntry : null;<a name="line.154"></a>
<span class="sourceLineNo">155</span>        }<a name="line.155"></a>
<span class="sourceLineNo">156</span>    }<a name="line.156"></a>
<span class="sourceLineNo">157</span><a name="line.157"></a>
<span class="sourceLineNo">158</span>    @Override<a name="line.158"></a>
<span class="sourceLineNo">159</span>    protected Map.Entry&lt;K, V&gt; searchAbove(K minKey, boolean inclusive) {<a name="line.159"></a>
<span class="sourceLineNo">160</span>        try {<a name="line.160"></a>
<span class="sourceLineNo">161</span>            return super.searchAbove(minKey, inclusive);<a name="line.161"></a>
<span class="sourceLineNo">162</span>        } catch (IllegalArgumentException e) {                      // handle case where elem is out of bounds<a name="line.162"></a>
<span class="sourceLineNo">163</span>            final Map.Entry&lt;K, V&gt; firstEntry;<a name="line.163"></a>
<span class="sourceLineNo">164</span>            try {<a name="line.164"></a>
<span class="sourceLineNo">165</span>                firstEntry = this.firstEntry();<a name="line.165"></a>
<span class="sourceLineNo">166</span>            } catch (NoSuchElementException e2) {<a name="line.166"></a>
<span class="sourceLineNo">167</span>                return null;<a name="line.167"></a>
<span class="sourceLineNo">168</span>            }<a name="line.168"></a>
<span class="sourceLineNo">169</span>            return this.getComparator(false).compare(minKey, firstEntry.getKey()) &lt; 0 ? firstEntry : null;<a name="line.169"></a>
<span class="sourceLineNo">170</span>        }<a name="line.170"></a>
<span class="sourceLineNo">171</span>    }<a name="line.171"></a>
<span class="sourceLineNo">172</span><a name="line.172"></a>
<span class="sourceLineNo">173</span>    @Override<a name="line.173"></a>
<span class="sourceLineNo">174</span>    protected NavigableMap&lt;K, V&gt; createSubMap(boolean reverse, Bounds&lt;K&gt; newBounds) {<a name="line.174"></a>
<span class="sourceLineNo">175</span>        final K lower = newBounds.getLowerBound();<a name="line.175"></a>
<span class="sourceLineNo">176</span>        final K upper = newBounds.getUpperBound();<a name="line.176"></a>
<span class="sourceLineNo">177</span>        final WK wlower = newBounds.getLowerBoundType() != BoundType.NONE &amp;&amp; lower != null ?<a name="line.177"></a>
<span class="sourceLineNo">178</span>          this.keyConverter.convert(lower) : null;<a name="line.178"></a>
<span class="sourceLineNo">179</span>        final WK wupper = newBounds.getUpperBoundType() != BoundType.NONE &amp;&amp; upper != null ?<a name="line.179"></a>
<span class="sourceLineNo">180</span>          this.keyConverter.convert(upper) : null;<a name="line.180"></a>
<span class="sourceLineNo">181</span>        NavigableMap&lt;WK, WV&gt; subMap = reverse ? this.map.descendingMap() : this.map;<a name="line.181"></a>
<span class="sourceLineNo">182</span>        if (newBounds.getLowerBoundType() != BoundType.NONE &amp;&amp; newBounds.getUpperBoundType() != BoundType.NONE) {<a name="line.182"></a>
<span class="sourceLineNo">183</span>            subMap = subMap.subMap(<a name="line.183"></a>
<span class="sourceLineNo">184</span>              wlower, newBounds.getLowerBoundType().isInclusive(),<a name="line.184"></a>
<span class="sourceLineNo">185</span>              wupper, newBounds.getUpperBoundType().isInclusive());<a name="line.185"></a>
<span class="sourceLineNo">186</span>        } else if (newBounds.getLowerBoundType() != BoundType.NONE)<a name="line.186"></a>
<span class="sourceLineNo">187</span>            subMap = subMap.tailMap(wlower, newBounds.getLowerBoundType().isInclusive());<a name="line.187"></a>
<span class="sourceLineNo">188</span>        else if (newBounds.getUpperBoundType() != BoundType.NONE)<a name="line.188"></a>
<span class="sourceLineNo">189</span>            subMap = subMap.headMap(wupper, newBounds.getUpperBoundType().isInclusive());<a name="line.189"></a>
<span class="sourceLineNo">190</span>        return new ConvertedNavigableMap&lt;K, V, WK, WV&gt;(subMap, this.keyConverter, this.valueConverter, newBounds);<a name="line.190"></a>
<span class="sourceLineNo">191</span>    }<a name="line.191"></a>
<span class="sourceLineNo">192</span>}<a name="line.192"></a>
<span class="sourceLineNo">193</span><a name="line.193"></a>




























































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